H2 database

About H2 database

H2 database is a Java-based database available for both embedded or client/server use. It’s very small and requires just 1.5MB of disk space. Created by Thomas Müller, man behind HyperSQL/HSQLDB, H2 is an improvement over his earlier work on HSQLDB. He was forced to stop working on HyperSQL by his then employer. When that company ran out of money 5 years later, Thomas decided that it makes more sense to do a fresh start and make radical changes than try to improve HSQLDB.

We support H2 directly in our products! You don't need separate drivers and can immediately connect to your database.

H2 supports durable disk-based tables, as well as in-memory tables (which are, of course, very fast). It can even emulate PostgreSQL when connected via Postgres’s ODBC driver. Multi-version concurrently control, table-locking, full-text search and data encryption are built-in – a surprisingly rich functionality for such a tiny database engine.

As an embedded database, H2 is very good. It’s fast, trivial to use – and works well. Many developers use it as an integration test database (we use it for that, as well).

All our applications are .NET applications. We opted to support Java-based H2 database by migrating it to .NET platform using IKVM.NET, which automatically migrates Java bytecode to .NET bytecode. Therefore, we have native support for H2 and can read, write and query H2.

H2 support in our products

All our products support H2 database natively. No drivers are needed, you will be able to work with H2 as soon as you run our applications.

Export your H2 database

It may make sense to migrate your data away from H2. You may want to do it permanently or just need to share your tables with a collague in a different format.

We will copy all your tables with their data and apply indexing and relationships exactly as they are in your current H2 database. In a nutshell, you get exactly the same database in another database engine. Each time you run the migration, we will copy all the tables again. Of course, we have a built-in scheduler, so you can run this overnight and have a fresh database copy in the morning.

Our top of the line database converter.Converts all source database to all target databases with all the options and optimizations.

Import data into your H2 database

Have a need to import data from various sources into your H2 database? Luckily we support many popular database formats to make this easy for you. Instead of messing with exporting from source, then working your way to somehow import data into H2, use our tool to copy all desired tables directly - quickly and easily.

Our top of the line database converter.Converts all source database to all target databases with all the options and optimizations.

Replicate your H2 database

If you have already created your target database (by yourself or using our Full Convert product), you can synchronize data in your target database with your original H2 database. We never pollute your databases with additional tables or triggers for replications. We never even write to your source database.

Replication allows you to update your target database very often, as we always write just a minimum of changes needed to bring databases in sync. For example, if you added three records to a single table in your H2 database, our replication product will write those three records to target database and nothing else. If you deleted some records, changed some others and inserted some, again – our product will pick that up and replay those changes in the target databases without touching existing data that should stay there. Our products are highly optimized for real-world workloads, so data that's inserted into different areas of table are combined and written using high-speed algorithms, as available in a specific target database.

You can run database replication often, as your target database is never empty while replication runs. You will simply see that your changes are applied on each run.

Our top of the line database query software. Easily connect to any of our many supported databases and explore it.

Document your H2 database schema

Database diagrams only get you so far. You may want to keep HTML mini-website for your database documentation so all your developers can be in the loop and quickly locate needed information. You may need it for a client report, or to distribute your database schema as a CHM file to people who need it.

Our products even allow you to upload the documentation to your FTP server, so your website copy is always current.